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Crispy Sweet Potato Fries

Perfectly crispy on the outside and tender inside, these oven-baked sweet potato fries are seasoned to perfection. A healthier alternative to regular fries that delivers maximum flavor and satisfying crunch without deep frying.

Golden crispy sweet potato fries on a baking sheet with visible seasoning

Prep Time : 15 min

Cook Time : 30 min

Servings : 4

Prep Time :

15 min

Cook Time :

30 min

Servings :

4

Ingredients

For the Sweet Potato Fries 

• 800g sweet potatoes, cut into fries


• 30ml olive oil — this one on Amazon


• 20g cornstarch


• 6g sea salt — this one on Amazon


• 3g paprika


• 2g garlic powder


• 2g black pepper

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Directions

  1. Prepare the Sweet Potatoes
    Peel 800g sweet potatoes and cut into fries about 1cm thick, keeping sizes as even as possible for consistent bake time. Place in a large bowl, cover with cold water, and soak 15 minutes. Drain, then pat completely dry with kitchen towels—take this seriously; any dampness will steam in the oven and soften the fries.
  2. Coat with Cornstarch
    Return dry fries to the bowl and sprinkle 20g cornstarch over them. Toss thoroughly until each fry looks lightly dusted and no dry piles remain in the bowl; cornstarch creates a thin layer that bakes crisp instead of turning sticky. Shake off any heavy clumps—too much cornstarch can turn pasty.
  3. Season and Oil
    Preheat oven to 220°C (425°F). Add 30ml olive oil, 6g salt, 3g paprika, 2g garlic powder, and 2g black pepper. Toss until evenly coated—oil should lightly coat, not pool at the bottom.
  4. Bake Until Crispy
    Spread fries in a single layer on two parchment-lined baking sheets so fries don’t touch. Bake 15 minutes, flip each fry, then bake another 15 minutes until golden and crisp at the edges. If fries are tender but not crisp, add 3–5 minutes and check frequently—sweet potato browning accelerates at the end. Serve immediately.

*Notes

  • Sweet potatoes are harder to crisp than russets because they contain more sugar and moisture. That’s why this recipe stacks technique (soak + dry + cornstarch + space) instead of adding more oil. If crispness is missing, fix dryness and spacing first.
  • Cornstarch works best as a thin, even coating. If you see white patches after baking, you likely had clumps—toss longer and shake off excess next time. The coating should be barely visible before baking.
  • Two trays are essential—crowding guarantees soft fries. Fries need dry hot air around them so moisture escapes; touching fries trap steam between surfaces. Bake in batches if you only have one tray.
  • Reheating: re-crisp in a 200°C oven for 8–10 minutes. Avoid the microwave; it turns the coating soft and chewy.

Nutrition Facts 

( per serving )

Calories

~254 kcal

Protein

 3 g

Fat

7 g

Carbs

44 g

Calories

~254 kcal

Protein

 3 g

Fat

7 g

Carbs

44 g

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Golden crispy sweet potato fries on a baking sheet with visible seasoning

Crispy Sweet Potato Fries

Perfectly crispy on the outside and tender inside, these oven-baked sweet potato fries are seasoned to perfection. A healthier alternative to regular fries that delivers maximum flavor and satisfying crunch without deep frying.
Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Servings: 4
Course: Side Dish
Cuisine: American
Calories: 254

Ingredients
  

For the Sweet Potato Fries
  • 800 g sweet potatoes cut into fries
  • 30 ml olive oil
  • 20 g cornstarch
  • 6 g salt
  • 3 g paprika
  • 2 g garlic powder
  • 2 g black pepper

Method
 

Prepare the Sweet Potatoes
  1. Peel 800g sweet potatoes and cut into fries about 1cm thick, keeping sizes as even as possible for consistent bake time. Place in a large bowl, cover with cold water, and soak 15 minutes. Drain, then pat completely dry with kitchen towels—take this seriously; any dampness will steam in the oven and soften the fries.
Coat with Cornstarch
  1. Return dry fries to the bowl and sprinkle 20g cornstarch over them. Toss thoroughly until each fry looks lightly dusted and no dry piles remain in the bowl; cornstarch creates a thin layer that bakes crisp instead of turning sticky. Shake off any heavy clumps—too much cornstarch can turn pasty.
Season and Oil
  1. Preheat oven to 220°C (425°F). Add 30ml olive oil, 6g salt, 3g paprika, 2g garlic powder, and 2g black pepper. Toss until evenly coated—oil should lightly coat, not pool at the bottom.
Bake Until Crispy
  1. Spread fries in a single layer on two parchment-lined baking sheets so fries don’t touch. Bake 15 minutes, flip each fry, then bake another 15 minutes until golden and crisp at the edges. If fries are tender but not crisp, add 3–5 minutes and check frequently—sweet potato browning accelerates at the end. Serve immediately.

Notes

Sweet potatoes are harder to crisp than russets because they contain more sugar and moisture. That’s why this recipe stacks technique (soak + dry + cornstarch + space) instead of adding more oil. If crispness is missing, fix dryness and spacing first.
Cornstarch works best as a thin, even coating. If you see white patches after baking, you likely had clumps—toss longer and shake off excess next time. The coating should be barely visible before baking.
Two trays are essential—crowding guarantees soft fries. Fries need dry hot air around them so moisture escapes; touching fries trap steam between surfaces. Bake in batches if you only have one tray.
Reheating: re-crisp in a 200°C oven for 8–10 minutes. Avoid the microwave; it turns the coating soft and chewy.